Effect of FIB-processed sharp flaw on fatigue limit of shot peened medium carbon steel

Author:  J. Sakamoto, Y.S. Lee, S.K. Cheong
Source:  Conf Proc 2014: ICSP-12 Goslar, Germany (pgs.86-89)
Doc ID:  2014055
Year of Publication:  2014
Abstract:  
Effect of surface flaw on fatigue limit of shot-peened medium-carbon steel was investigated. Fatigue tests were conducted by using the specimens containing an artificial flaw with focused ion beam technique. The fatigue limits were increased by shot peening. The non-damaging region of flaw size can be increased by shot peening. Considering the introduction of small cracks due to shot peening, the flaw which is smaller than the cracks seems not to affect fatigue limit. Shot peening is useful for materials with a surface flaw introduced after the treatment.